Ma valve a Globe, mavavu pachipata, mavavu agulugufe, cheke mavavu, mavavu mpira, ndi zina zonse ndi zigawo zofunika kulamulira mu machitidwe osiyanasiyana mapaipi. Vavu iliyonse imakhala yosiyana ndi mawonekedwe, kapangidwe kake komanso ngakhale kagwiritsidwe ntchito. Komabe, valavu ya globe ndi valavu ya pachipata ali ndi zofanana m’maonekedwe, ndipo zonse ziri ndi ntchito yodulira mapaipi, kotero mabwenzi ambiri amene samalumikizana pang’ono ndi mavavu amasokoneza awiriwo. M'malo mwake, ngati muyang'ana mosamala, kusiyana pakati pa valavu yapadziko lonse lapansi ndi valavu yachipata ndi yayikulu kwambiri.

1 Zomangamanga

Pamene malo oyika ali ochepa, muyenera kumvetsera zosankhidwazo. Valve yachipata ikhoza kutsekedwa mwamphamvu ndi malo osindikizira ndi kuthamanga kwapakati, kuti akwaniritse zotsatira za kutayikira. Potsegula ndi kutseka,pachimake valavu ndi mpando valavu kusindikiza pamwambanthawi zonse amalumikizana ndikupakana wina ndi mzake, kotero kuti kusindikiza pamwamba kumakhala kosavuta kuvala. Pamene valve yachipata ili pafupi kutseka, kusiyana kwapakati pakati pa kutsogolo ndi kumbuyo kwa payipi kumakhala kwakukulu kwambiri, zomwe zimapangitsa kuti malo osindikizira azivala kwambiri. Mapangidwe a valve yachipata adzakhala ovuta kwambiri kuposa valavu ya globe. Kuchokera pamawonekedwe, pansi pa caliber yomweyi, valavu yachipata ndi yapamwamba kuposa valavu yapadziko lonse, ndipo valavu yapadziko lonse ndi yaitali kuposa valve yachipata. Kuphatikiza apo, valve yachipata imagawidwanso kukhala tsinde lokwera ndi tsinde lobisika. Vavu yapadziko lonse lapansi ilibe.

2 Mfundo yogwira ntchito

Pamene valavu yoyimitsa imatsegulidwa ndi kutsekedwa, ndi mtundu wa tsinde la valve, ndiko kuti, pamene gudumu lamanja likutembenuzidwa, gudumu lamanja lidzazungulira ndikukwera ndi kugwa ndi tsinde la valve. Valve yachipata imatembenuza gudumu lamanja kuti tsinde la valve liwuke ndi kugwa, ndipo malo a handwheel palokha amakhalabe osasintha. Mtengo wothamanga ndi wosiyana. Valve yachipata imafuna kutseguka kwathunthu kapena kutseka kwathunthu, pomwe valavu yoyimitsa sichitha. Valavu yoyimitsa ili ndi njira zolowera ndi zotuluka; valve yachipata ilibe njira yolowera ndi njira yotulukira.Kuonjezera apo, valve yachipata ili ndi zigawo ziwiri zokha: kutsegula kwathunthu kapena kutseka kwathunthu. Chipata chotsegula ndi kutseka ndi chachikulu ndipo nthawi yotsegula ndi yotseka ndi yaitali. Kuthamanga kwa mbale ya valve ya valve yoyimitsa ndi yaying'ono kwambiri, ndipo mbale ya valve ya valve yoyimitsa imatha kuyima pamalo ena panthawi ya kayendetsedwe ka kayendetsedwe ka kayendedwe ka kayendedwe kake. Valve yachipata ingagwiritsidwe ntchito podula ndipo ilibe ntchito zina.

3 Kusiyana kwa magwiridwe antchito

Vavu yoyimitsa imatha kugwiritsidwa ntchito podula zonse ziwirioff ndi flow regulation. Kukaniza kwamadzimadzi kwa valve yoyimitsa kumakhala kwakukulu, ndipo kumakhala kovuta kwambiri kutsegula ndi kutseka, koma chifukwa mbale ya valve ndi yaifupi kuchokera kumalo osindikizira, kutsekula ndi kutseka kwapakati kumakhala kochepa. Chifukwa valavu yachipata imatha kutsegulidwa kwathunthu ndikutsekedwa kwathunthu, ikatsegulidwa kwathunthu, kukana kwapakati pamayendedwe a valve thupi pafupifupi 0, kotero valavu yachipata idzakhala yopulumutsa ntchito kuti itsegule ndi kutseka, koma chipata. ili kutali ndi malo osindikizira, ndipo nthawi yotsegula ndi yotseka ndi yaitali.

4 Kuyika ndi njira yoyendetsera

Valve yachipata imakhala ndi zotsatira zofanana mbali zonse ziwiri, ndipo palibe chofunikira pa njira zolowera ndi zotuluka panthawi yoika, ndipo sing'anga imatha kuyenda mbali zonse ziwiri. Valve yoyimitsa iyenera kukhazikitsidwa mosamalitsa molunjika komwe kuli chizindikiro cha muvi pa thupi la valavu. Palinso malamulo omveka bwino pamayendedwe olowera ndi kutuluka kwa valve yoyimitsa. valavu ya dziko langa "atatu-m'modzi" amafotokoza kuti njira yolowera ya valve yoyimitsa nthawi zonse imakhala kuchokera pamwamba mpaka pansi.

Valavu yoyimitsa ndi yolowera pang'ono komanso yotsika kwambiri, ndipo kuchokera kunja zikuwonekeratu kuti payipi siili pamzere wopingasa womwewo. Njira yoyendetsera valve pachipata ili pamzere wopingasa womwewo. Kugunda kwa valve pachipata ndi kwakukulu kuposa kwa valve yoyimitsa.

Kuchokera pakuwona kukaniza koyenda, valve yachipata imakhala ndi kukana koyenda pang'ono ikatsegulidwa kwathunthu, ndipo valavu yoyang'ana imakhala ndi kukana kwakukulu. Kuthamanga kwamphamvu kwa valve yachipata wamba ndi pafupifupi 0.08 ~ 0.12, mphamvu yotsegula ndi yotseka ndi yaying'ono, ndipo sing'anga imatha kuyenda mbali ziwiri. Kukana koyenda kwa ma valve oyimitsa wamba ndi nthawi 3-5 kuposa ma valve a pachipata. Potsegula ndi kutseka, kutseka kokakamiza kumafunika kuti mukwaniritse kusindikiza. Chovala cha valve cha valve yoyimitsa chimakhudza malo osindikizira pokhapokha atatsekedwa kwathunthu, kotero kuvala kwa malo osindikizira kumakhala kochepa kwambiri. Popeza mphamvu yothamanga kwambiri ndi yayikulu, valavu yoyimitsa yomwe imafunikira actuator iyenera kulabadira kusintha kwa makina owongolera ma torque.

Pali njira ziwiri zoyikira valve yoyimitsa. Chimodzi ndi chakuti sing'anga imatha kulowa kuchokera pansi pa valve core. Ubwino wake ndikuti kulongedzako sikuli kupanikizika pamene valavu yatsekedwa, yomwe imatha kupititsa patsogolo moyo wautumiki wa kulongedza, ndipo kunyamula kungasinthidwe pamene payipi kutsogolo kwa valve ikupanikizika; kuipa kwake ndikuti mphamvu yoyendetsa valavu ndi yayikulu, yomwe imakhala pafupifupi 1 nthawi yothamanga kuchokera pamwamba, ndipo mphamvu ya axial pa tsinde la valve ndi yaikulu, ndipo tsinde la valve ndilosavuta kupindika. Choncho, njirayi nthawi zambiri imakhala yoyenera kwa ma valve oima ang'onoang'ono (pansi pa DN50), ndipo ma valve oyimitsa pamwamba pa DN200 amagwiritsa ntchito njira yapakati yolowera kuchokera pamwamba. (Ma valve oyimitsa magetsi nthawi zambiri amagwiritsa ntchito njira yolowera kuchokera pamwamba.) Zoyipa za njira yolowera kuchokera pamwamba ndizosiyana ndendende ndi njira yolowera kuchokera pansi.